The three inch tube plugs into the snout in the front of the air cleaner.
I doubt that would rattle much. Seems like if it did a little duct tape would quiet it until a replacement could be found.
The usual suspect with this is the air cleaner canister rattling against the valve cover. There is a very tight gap between the two. Some have has success with drillling a hole into the housing and using a broken mount from under the housing. You can just intall it on the side of the canister where it rattles against the valve cover. Takes a small metric nut to fasten it. I used some weatherstripping to stop the rattle. So far, so good.